Give structural formula of prop-1-en-2-ol.

Explanation

To derive the structural formula of prop-1-en-2-ol, we will follow these steps:

### Step 1: Identify the Carbon Chain
The name "prop" indicates that there are three carbon atoms in the chain.

**Hint:** The prefix "prop" refers to a three-carbon alkane.

### Step 2: Determine the Position of the Double Bond
The "1-en" part of the name indicates that there is a double bond starting at the first carbon atom.

**Hint:** The "en" suffix indicates the presence of a double bond, and the number before it shows its position.

### Step 3: Identify the Hydroxy Group
The "2-ol" part of the name indicates that there is a hydroxyl group (-OH) attached to the second carbon atom.

**Hint:** The "ol" suffix indicates the presence of an alcohol group, and the number indicates its position on the carbon chain.

### Step 4: Draw the Carbon Chain
Now, we will draw the three carbon atoms in a straight chain:
```
C1 - C2 - C3
```

### Step 5: Add the Double Bond
Since the double bond is at the first carbon, we will modify the structure to include the double bond between the first and second carbon:
```
C1 = C2 - C3
```

### Step 6: Add the Hydroxy Group
Next, we will add the hydroxyl group (-OH) to the second carbon:
```
C1 = C2(OH) - C3
```

### Step 7: Complete the Valency of Carbon Atoms
Now, we need to add hydrogen atoms to satisfy the tetravalency of carbon:
- Carbon 1 (C1) will have 2 hydrogens (H2).
- Carbon 2 (C2) will have 1 hydrogen (H) because it is bonded to another carbon and the hydroxyl group.
- Carbon 3 (C3) will have 3 hydrogens (H3).

Putting it all together, we get:
```
H OH
| |
H2C = C - CH3
```

### Final Structural Formula
The structural formula of prop-1-en-2-ol can be represented as:
```
H OH
| |
H2C = C - CH3
```
Or in a more condensed form:
```
CH2=CHOH-CH3
```

### Summary of Steps:
1. Identify the carbon chain (3 carbons).
2. Determine the position of the double bond (1st carbon).
3. Identify the hydroxyl group (2nd carbon).
4. Draw the carbon chain.
5. Add the double bond.
6. Add the hydroxyl group.
7. Complete the valency with hydrogen atoms.